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8HP BRIGGS, Broken Rod-?How to Remove Flywheel?

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Pat

12-04-2002 19:14:21




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Hello Guys,
I am new to this board, but I was wondering if I could get a little help.

My grand father puchased a brand new generator in the '80's and it sat in a crate w/o oil until this summer. I put oil in it and installed the plug wire and sure enough it started, and ran well.

It has an 8HP Hor. shaft B/S with recoil only.

I used it for about 30-40 hr over the summer, and tonite I started it to run a light. I started-first pull, ran a few mins and quit, making all kinds of noises internally(METAL).

I loaded it on the truck and took it to the heated shop. pulled on the rope -very easy to pull, normally will upset machine if you don't hold it down and pull!

So, I removed the head, and found the piston not attached to the crank. Removed gen and split the case. Found rod in a bunch of pieces, and looks like the brg spun on the crank for a while.

My BIG question is, How do I safely remove the flywheel with the recoil end on it? I have read about them shattering if pried on-do not want that!! Also, are rod brgs available undersize to compensate for machining the crank?

Where is a good source for Rod, Brgs., Gasket,and Tech Manual

Also, what is the usual price to turn a crank?

Thank You Very Much in advance, Pat

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Pat

12-05-2002 13:59:38




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 Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Pat, 12-04-2002 19:14:21  
Thanks to all who replied!

I just got the clutch, and f.w. off and the crank out! w/o any problems!

Thanks again, Pat



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pat

12-05-2002 10:22:58




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 Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Pat, 12-04-2002 19:14:21  
Thanks for the help guys, I just got back with a "Flywheel Knocker" And I will give it a shot in a few mins.
Pat



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Gary in TX

12-05-2002 09:28:13




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 Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Pat, 12-04-2002 19:14:21  
As among my other areas of work I am a small engine mechanic as well. If you allready have everything off the lower end then take your recoil starter off , remove the little screen, then with a special tool or some big channel locks or pipe wrench take off the starter clutch, there will be a bevel washer under the starter clutch. Being as the lower end is off from what you said, sit the motor down on top of a bucket or whatever and place a block of wood on top of the crankshaft, should drop right out of the block.

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pat

12-05-2002 19:24:25




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 Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Gary in TX, 12-05-2002 09:28:13  
Gary,
Man the bucket trick worked great!! All the little pieces fall right in it -no searching under the table!!

Also thanks for the help removing the clutch, Never took one off, and just as sure as I do something w/o reading or asking I tear something UP!



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Gary in TX

12-06-2002 08:19:31




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 Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to pat, 12-05-2002 19:24:25  
Good to hear Pat, just wish your motor wasn't in a bad way. It shouldn't be too costly to fix and if you look around you may be able to find a donor motor. Check the scrap yards. I bought a edger at one for 15.00 and I think all I did too it was put point, cond. and plug in it, runs like a charm. People are a crazy animal, they tend to throw away perfectly good stuff!



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Jim S.

12-05-2002 05:49:18




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 Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Pat, 12-04-2002 19:14:21  
If yer referring to the B&S type flywheel with the shaft on the crank, over which the pull starter drive is screwed, then:

--Remove the starter drive by unscrewing it.
--Purchase a flywheel "knocker," which is a metal device that fits over the end of the crank (about $5).
--Pry up slightly on the flywheel with screwdriver.
--Rap on the knocker with a hammer.

It does not take very much upward pressure on the flywheel to pop it off with one or two raps. I removed even the lightweight lawnmower type flywheels with these knockers as a pro small engine mechanic for years, no problems. The flywheel in your application should be a heavy weight flywheel.

You likely will find the soft key has been sheared.

Hope it helps.

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Pat

12-05-2002 19:28:06




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 Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Jim S., 12-05-2002 05:49:18  
Jim,
I bought a "knocker" and it sure did the trick!

Also, I guess where it never locked up or hit anything, the key was spared-thank goodness! Not expensive, but just one more thing to buy!

Thanks, Pat



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Jim S.

12-06-2002 08:36:22




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 Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Pat, 12-05-2002 19:28:06  
Glad to help, Pat. Glad others jumped in to help you get the starter clutch off. Yer on yer way now!



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pat

12-05-2002 06:08:47




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 Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Jim S., 12-05-2002 05:49:18  
Hello again,
The "recoil starter clutch" is square shaped,and will turn freely in one direction(one-way cluth).

I am unsure how it is removed, there are no visible attaching pieces(ei bolts, nuts, or flats to put wrench on to unscew entire unit).

Thanks again, Pat



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Brian G. NY

12-05-2002 07:33:01




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 Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to pat, 12-05-2002 06:08:47  
There is a special wrench for that. I don't have one. If you look at the recoil closely, you will find it has 4 "lugs" down close to the flywheel. I have had good luck carefully tapping on these with a hammer and drift punch; it turns off CCW as the crank end is RH thread. I have worked on several Small B&S engines and the ones I've worked on have two 1/4" threaded holes in the flywheel for a puller. A puller can be made real easy using a 1/2" center bolt, 2 1/4" bolts and a piece of 1/4" or thicker piece of plate. Actually, you can dispense with the center bolt if you add nuts to the 1/4" bolts above the plate and use them as the pulling force. Someday I'll get a knock-off puller, maybe. An old timer showed me another means of loosening small engine flywheels. Take a deep well socket or piece of pipe that fits over the crankshaft end and contacts the flywheel. Then give it a "meaningful" rap with a heavy hammer as if driving the flywheel on. Instead it will "pop" off. I still use this method now and again but generally I use my homemade puller. Over the years I've patched two different B&S aluminum blocks where the rod tried to exit. In one case where the hole was fairly small, I used "Bondo" (body filler) in the other case, I made an aluminum plate which I screwed on with 1/4" bolts, using liquid aluminum as a sealer. They both ran for years; may still be running for all I know.

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pat

12-05-2002 19:36:48




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 Re: Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Brian G. NY, 12-05-2002 07:33:01  
Brian,
Thanks for stating the direction of threads!!

A co-worker and friend of mine was trying to remove a fanclutch from a t444e intenational diesel one time at the IH dealer where we worked, and assumed it was LH like all of the older 7.3's were. However, it was RH!! He beat on it for 2hrs. before he found out it was RH!! He didn't do to well on the flat-rate for that job, but at least it taught the two of us to check first!!

Thanks again, Pat

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Brian G. NY

12-06-2002 06:40:10




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 Re: Re: Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to pat, 12-05-2002 19:36:48  
Reminds me of the time I was trying to remove the lugnuts on my first F350 Dually. Busted my a$$ til I saw the little "L" on the end of the stud!!



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Gary in TX

12-06-2002 08:32:34




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 Re: Re: Re: Re: Re: Re: 8HP BRIGGS, Broken Rod-?How to Remove Flywheel? in reply to Brian G. NY, 12-06-2002 06:40:10  
Sounds like a F product, backwards!



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